Rich's products are made from OptiMSM exclusively!

OptiMSM information from Bergstrom's YouTube video:

The Bergstrom Nutrition® commitment to quality shows in every step of our production process. No pesticides, herbicides, or Genetically Modified Organisms (GMOs) are involved in the raw materials or the manufacturing process. There is no exposure to common allergens or aflatoxins.
To further ensure a purity level of greater than 99.8%, we confirm every batch through an independent laboratory and report the findings on a detailed certificate of analysis. It is this commitment to going "above and beyond" that makes Bergstrom Nutrition the world leader in MSM.
Our MSM is made in the USA in our state-of-the-art production facility in Vancouver, WA. This closed-system plant is engineered to distill the purest possible MSM while reducing waste, creating optimal efficiency, and virtually eliminating the risk of contamination.
OptiMSM® is manufactured in the only dedicated cGMP-compliant MSM production facility in the world, eliminating the risk of contamination from toxins like benzene, toluene, or pesticides. Additionally, ours is the only single-purpose MSM production facility that is ISO 9001:2008 registered and FSSC22000:2010 certified.
Purification is an essential step in the production of MSM, and Bergstrom Nutrition® sets the gold standard in the industry. We start with the best quality raw materials, then utilize a four-stage distilling process to ensure optimal purity.
Crystallization and distillation are the two methods manufacturers commonly use to purify MSM. Chemical engineers recognize distillation, which was pioneered by Bergstrom Nutrition, as the superior purification method. Many manufacturers chose crystallization because it is a cheaper process, but we won't compromise purity for the sake of economics. Only Bergstrom Nutrition MSM is guaranteed to be positively pure through purification by distillation.
A Difference You Can See
Crystallized MSM is highly dependent on both the quality of the water and raw materials, because a "wash and centrifuge" process is used to separate impurities and manufacturing by-products. As crystals form, occlusions develop that can entrap contaminants present in the solution.
By contrast, Bergstrom Nutrition's exclusive four-stage distilling process uses heat to separate impurities and manufacturing by-products, allowing 99.9% pure MSM to be isolated from the solution. In addition to being a very pure product, our distilled MSM has a low moisture content, which reduces the risk of microbial contamination and product degradation.